Electric pull-switch.



F. BARR.

ELECTRIC PULL SWITCH.

APPLICATION FILED 001224,'1912.

1,097,201 Patented May 19, 1914.

FREDERIC BARR, F NEW YORK, N. Y.

ELECTRIC PULL-SW1TCH.

I To all 'whom t may concern.' l

Be it known that L'Fimnemo BAniz, a citizen of the United States of Amerlca, and

residing at New York, in the county 'of' Kings and State of New York,lhave invented new and useful Improvements in Electric Pull-Switches, of which the following is a lspecification.

My invention relates particularly to a onstruction adapted to be used in a wall One object is to provide a construction which can be readily made, assembled and operated.

Another object is-to provide a construction which is sim le and reliable. Y

Another object is to so completelyT insulateand protect the contacts and the operating parts that a short circuit or ground is impossible. I

In 'the form' shown the Ainvention comprises two insulating block members, one of which serves as a container for the other which latter carries the-switch mechanism, the twomembers being so constructed and arranged that-while the parts can be readily assembled and adjusted, they are held securely in' position and properly insulated and protected. The two insulating members.

are held together by-a bridge member which also serves to connect the members to a 'wall or switch box and to serve as a means for attaching the face plate.

-Figure 1, is a vertical section and side elevation oi-a switch in a wall box, the switch being shown in section on the plane of thel line V V of Fig. 2 looking in the direction of the arrow. Fig. 2, is a front view ot the switch. Fig. 3, is a vertical section on vthe plane of the line X X of Fig. 2 .looking in the direction of the arrow. Fig. f1, is a horizontal section and .plan on the plane of the line Y Y oi: Fig. 2 looking in the direction of the arrow. Fig. 5, is a vertical section and'elevation on the plane of the line Z Z of Fig. 3 looking in the direction of the arrow. Fig. 6, is a perspxectiveview of the insulating member'whic serves as a container or receptacle' orthe other parts. Fig. 7,'is a perspective view of the insulating member which carries the. switch mechanism and is adapted to .be insertedinto or removed from the front of the member shown in Fig. G. Fig. 8, is a view oftthe inner side of the switch A carrying member with the rotating switch member and the operating member Specification ofv Letters Patent.

Patented May 19, 19121.

Application mea october 24, 1912. serial No. 727,474.

removed. Fig. 9, is a perspective View of the bridge member.

The members 1 and 2 are preferably formed of insulating material such as porcelain, the former being provided with a recess shaped to receive and hold the latter as will be more fully hereinafter understood. The bridge member 3 extends over .part of the face of the two members 1 and 2 and holds the member 2 in the member 1. The parts are designed to be used in any` suitable form of switch or wall box such as t and with a face plate 5 having an opening suitably formed-to accommodate the operating cord or pull chainv 6 as it is commonly termed. 1

All of the switch mechanism is carried by the member 2. In the form shown, the inclined segmental yielding switch contacts 7 l and 8. 4are mounted on opposite sides of a central boss 9 and between them are the in clined shoulders 10 and 11. Each4 switch contact has a foot portion secured beneath the base of a circuit terminal 12. The outer end 13 of the circuit. terminal extends at right angles to the base 12 and is provided with a binding screw 14. The insulating mem. ber 2 is preferably recessedals at 15 so -as to allow the outer surface' of the circuit terminal 12 to be Hush with the surface of the meme" ber 2. A screw 16 passes through the mem-4 -ber 2 and through the footof the switch contact Tand screws into a circuit terminal. A spindle 17 is rigidly secured' to the member 2 andserves as a support for the movy able parts of the switch mechanism. ,An in-v sulating disk 18 vis rotatably mounted on the spindle and secured to it is' the switch member 19 having two spring arms for engaging the switch contacts 7 and 8. A ratchet operating member 20 is mounted so that it -may be oscillated on thespindle lfor the purpose of rotating the carrier disk l18 and switch member 19 stepby step. This disk 18 is adapted to be turned anti-clockwise by the pullv of the chain 6. A spring 21 has one end engaging the mm of t-he ratchet and the other end eng-.'ging a notched abutment. 22 whichis screwed on to the end of the spindle. The tension of the spring is adjusted to return the ratchet 20 toits normal position when the pull on the chain G is released.

Around the outer edgeot the member 2 is provided an vinsulating guard flange 23` which extends between the two circuit terminals and prevents the chain 6 from com-` The interior of the member 1 is preferably provided with a groove or channel 27 for the end of the spindle, spring and abutment on the end of the spindle. This prevents any possibility of the chain being caught around the end of the spindle in .adjusting or'manipulating the mechanism. rlhe back of the recess in the member l is provided with a shoulder 28 which serves as a stop or abutment for the ratchet member 20 as shown, particularly in-Fig. l. The member l is also provided with a flange 29 which eX- tends over the base of the adjacent circuit,

terminal so as to prevent the operating chain from coming into contact therewith.

The bridge member 3 is preferably formed of sheet metal such as brass and provided with lateral extensions 30, 30 symmetrically arranged and adapted to fit into recesses l in the member-'l and 32 in the member2 respectively. lhemcmbcr l is also provided with-longitiulinally extending face grooves or recesses 33 to accommodate the main arms of the bridge member By this construction 'the bridge member is let into the face of the insulating block and lies flush therewith, the shape of the parts assuring accurate assembling and preventing accidental displacement. 'lhe bridge member is secured to the insulating member 1 by means" of screws such as 3st passingfrom the rear through holes in the ends of the insulating' member. The bridge member is proyided with an opening 35 in the center for the operating chain. lhe ends'of the bridge member are adapted to be secured for instance, by means of screws such as 36 to the switch or wall box 4. lhc face plate -is adapted to be secured to the bridge member by screws such as 37. 'l`hc face plate is preferably provided withlan extending bell 3 which servcsv'as a guide for the operating chain at the point where it emerges.

lt will be noted' that the switch mechanism is all carried by the insulating member' 2 and may be readily removed from or inserted into the menlber lV when the bridge member fi is released. to assemble the parts in the process of manufacture or for the purpose ol repair or adjustment afterward. lt will also be noted' that this method of construction does not` necessitate the formation oi any holes through the container l extending into the interior. It will alsobe noted that there are lt is therefore easy' noemer no exposed screw heads connected to parts which carry current, the screws such as 16 vthey can be made by 4simple die/action ineXpensively.

What I claim is 1. A'pull switch comprising an insulating container member having a recess in one face thereof, an insulating carrier member removably tting in one side of said recess, switch mechanism carried by said carrier and including a spindle extending'toward, the opposite side of said recess, switch contacts, an

operating ratchet anda chain, said container having an interior groove open at the front with walls uarding the end of said spindle from-said chain.

2. A pull switch comprising an insulating member having a recess, an insulating c arrier removably ittingin one side of said recess, switch mechanism carried by said carrier and including switch contacts and circuit terminals and an operating chain, said recessed member having an insulating flange.

extending over one of said circuit terminals a'nd interposed between said terminal and said operating chain.

3. ln a pull switch, an insulating body comprising a container member having a recess opening toward the front and a carrier member insertible into said recess from the front thereof, pull switch mechanism mounted on said carrier member and removable therewith, a bridge member adapted to be secured to a receptacle and having an opening for the operating chain and also having a portion extending over one edge of said carrier member, means for detachably securing said bridge member to said container member to thereby hold said carrier member within said container member, said carrier member being readily removable from said container member when said bridge member is detached from said container member.

4. A. pull switch comprising an insulating container having a recess, a carrier removablylitting in said recess, switch contacts anc circuit terminals carried by said carrier, an operating chain carried by said carrier, said container and said carrier having insulating walls preventing said chain from engaging said circuit terminals. f

5. A pull switch comprising an insulatipg container having a recess, a carrier removably tting in said recess, circuit terminals, switch contacts and operating mechanism carried by said carrier and including a pull chain, and an insulatingguard extending 'between said circuit terminals around the outer side of said switch contacts adjacent` the operating chain. i

(l. A pull switch comprisingl an insulating container having a recess, a carrier 1 emoV- ably fitting in said recess, switch contacts and an operating ratchet carried by said carrier, said container having a shoulder acting as a hack stop for said operatingratchet.

7 A pull switch comprising an insulating container having a recess, an insulating carnism and circuit terminals all carried by said carrier, said circuit terminals being arranged at the front of said carrier and accessible thereat and said container member having 20 passages for the circuit Wires leading from the back forward to said terminals and a bridge member for removably securing said carrier in said container.

9. A pull switch comprising insulating 25 container having a recess, an insulating carrier removably fitting in said recess, circuit terminals and pull switch mechanism carried by said carrier, said container and saidcarrier having insulatin -ianges surrounding 30 the outer ends of sai circuit terminals and a face plate extending over said container and said carrier and having a guide for the pull chain.

FREDERIC BARR.'

Ron'r. S. ALLYN, v Ez BRADFORD.

Witnesses: 

